Collapsible bed-spring



0.1. AND w. c. DAVIS.

COLLAPSIBLE BED SPRING.

APPLICATION FILED SEPT. 20, 1915.

Patented Oct. 25, 1921.

t I u QM M INVENTO/RS ATTORNEY.

STATES TEE FFiCE.

DAVID 'J. DAVIS AND WILLIAM C. DAVIS, or cOLUMB'oS, oHIo; sAID WILLIAM DAVIS ASSIGNOROF FORTY PERCENT. TO GEORGE DAVIS, or COLUMBUS, OHIO.

' oo LArSIBLE BED-SPRING.

Specificationof Letters Patent. Patgntgd 1 2'5 1921 Application filed September a, 1915. Serial No. 51,587.

To all whom it may concern:

Be it known that we, DAVID J. .DAVIS and WILLIAM C. DAVIS, citizens of. the United States of America, residing at Columbus, in the county of Franklin-and State of Ohio, have invented certain new and useful Improvements in Collapsible Bed-Springs, of which the following is a specification.

Our invention relates to collapsible bed springs and comprise a structure which is capable of being readily collapsed, owing to a minimum number of parts, but is nevertheless amply rigid when the parts are assembled. It has many novelstructural characteristics which result in advantages that will appear as this description progresses.

For instance, our improvement embodies a structure in which a uniform pull may be I exerted at a number of points across the end of the web structure of the bed spring; or

wherein the tension on these points may be simultaneously released; or pawl and ratchet structure of such a nature that the tension of the web of the bed pring may be relieved in stages; or structural features which permit of the separation of the end pieces carrying the web from the side pieces, this being possible without detaching the web from the end pieces; or means for adjusting the length of the web.

There are so many features of advantage that it is difficult to, catalogue them at this point of the specification and so the points of interest will be developed in conjunction with the detailed description.

The preferred embodiment'of our invention is shown in the accompanying drawings wherein similar characters of reference des ignate corresponding parts, and wherein- Figure 1 is a perspective view of our bed spring assembled.

Fig. 2 is a plan view of one corner of our bed spring.

Fig. 3 is a side elevation of the details shown in Fig. 2.

Fig. 4 is a detail in plan of one end of our web and winding roller therefor.

Fig. '5 is an end elevation of the frame work of our bed spring.

In the drawings, the bed spring comprises tubular side pieces 1 which are intended to be disposed parallel and which have sockets in their extremities for the reception of reduced cylindrical portions 2 on the feet 3 of the end pieces. These feet 3 carry laterally extending lugs 4 erving to support the bed sprlng in. proper position in a bedstead. The feet 3 are further rigidly connected'and Spaced by rods 5 and have upwardly and outwardly extending arms 6 in which are journaled winding rollers 7. These rollers 7 are reduced at proper points to be rotatably supported in the journal members 6 and immediately exterior to these journal members. they are provided with ratchet teeth 8 co-acting with pawls 9 for locking the rollers 7 against rotation toward each other. These. pawls 9 are relatively inclependent and are so-weighted at their outer extremities 10 that movementpast the dead center in one direction maintains them in operative position while movement past this dead center in opposite direction maintains them in inoperative position. Rotation of these rollers 7 is designed to be effected by a wrench operating upon the angular portions 11.

Each roller 7 carries a plurality of determinately spaced Theads 12, the heads of these members being disposed parallel to the axis of the roller. Detachably secured to these Theads are chains 13 whose end links are first given a quarter turn and placed upon the Theads 12 and then returned to normal position, where they are retained by the tension of coil Springs 14 connecting the inner ends of these chains with a flexible, non-resilient web 15. These chains being made up of a plurality of links are adjustable to any desired extent for varying tension of the web.

The most effective method of collapsing our bed spring consists in applying a wrench to the portion 11 of the roller 7, slightly rotating said roller outward and then releasing the pawls 9 governing this roller. If the bed spring is a large one with a consequently greater tension, it is frequently desirable to throw back one pawl and while operating the wrench with one hand use the other pawl to prevent a too rapid removal of the tension from the bed spring by relieving such tension in successive stages. The other roller 7 may be released in a similar manner and this relief of the tension upon the web of the bed spring will permit ready withdrawal of the end pieces from the side pieces 1. Thus the bed spring is collapsedand the web of the spring together with the end pieces to which it is connected can b folded for shipment. If desired the non-resilient web 15 may be detached from the springs which are provided with hook ends as at'16, or these springs being provided with hook ends 17 may be detached from the chains.

It will appear that there are many features of importance in this outlined structure. The possibility of relieving the tension simultaneously on all points of one end of the web of the bed spring makes it possible to vary the tension of this web without danger of distorting the spring. The provision of rigid braces between the feet of the end pieces efiectually guards against distortion of these end pieces which is very liableto occur under the prevalent stresses. Further more, the structure is such that a tensioning of the web of the bed spring tends to pull the upward sides of the end pieces toward each other andto tilt the reduced portion 2 of the feet'3 in their sockets. The result is not only a firm holding of these reduced portions against accidental re-, moval from their sockets but this tilting action insures a rigid structure whose parts will not rattle or Work loose. In addition,

the type of pawls used may be rendered entirely inoperative or one of them may be rendered inoperative while the other is used to assist'in varying the tension of the web of the bed'spring. A feature of importance isthe rapidity with which our bed spring may be collapsed. Various other features will appear from a study of the structure outlined and described.

Having thus described .our invention, what we claim is: p

1. A bed spring comprising a frame-Work,

a web structure, a winding roller, loop memberson said web structure, and T-heads on said winding roller for the reception of said loop members at right angles to the direction of pull.

2. A'bed spring comprising a frame-work, a web structure, a winding roller, chains on and directly connected to saidweb struc ture, and. T-heads on said "winding roller for the retention of any link of any chain.

In testimony-whereof we hereby afiix our signatures.

- DAVID J. DAVIS.

7 WILLIAM G. DAVIS. 

